JP7292141B2 - Rotor Manufacturing Apparatus, Rotor Manufacturing Method, and Permanent Magnet Motor Manufacturing Method - Google Patents

Description

The present application relates to a rotor manufacturing apparatus , a rotor manufacturing method , and a permanent magnet motor manufacturing method .

A rotor included in a permanent magnet motor is manufactured by attaching permanent magnets to magnet attachment grooves of a rotor core in which protrusions and magnet attachment grooves are alternately provided. When attaching the permanent magnets to the rotor core, it is necessary to prevent the permanent magnets from jumping to the rotor core and colliding with the rotor core due to the magnetic attraction force acting between the permanent magnets and the rotor core, thereby preventing the permanent magnets from being damaged. It is also necessary to prevent the permanent magnet from coming off the magnet attachment groove after attachment. For this reason, magnet centering chucks are provided on both sides of the magnet sticking head portion that holds the permanent magnets and moves to the magnet sticking grooves to sandwich and hold the permanent magnets and increase the attractive force of the permanent magnets. Further, a movable magnet transfer bar is provided inside the magnet adhering head and protrudes from the holding portion that holds the permanent magnet so that the permanent magnet can be detected by the magnet transfer bar alone before holding and after adhering the permanent magnet. is adsorbed.

When attaching the permanent magnet to the magnet attachment groove via an adhesive, the side wall of the magnet attachment groove and the permanent magnet are placed in order to confirm that the space between the permanent magnet and the magnet attachment groove is sufficiently filled with the adhesive. The adhesive was made to protrude to the top of the protrusion from between the side surface of the However, if the adhesive protruding from the top adheres to the magnet centering chuck, there arises a problem that it causes deterioration of the positioning accuracy of the magnet and contamination with foreign matter. Therefore, the operator had to periodically wipe off the adhesive from the magnet centering chuck, further complicating the manufacturing process.

In order to solve this problem, a configuration of a rotor core is disclosed in which an adhesive reservoir recess is provided on the top side between the side wall and the top of the magnet attaching groove so that the adhesive does not protrude from the top of the protrusion. (See Patent Document 1, for example).

JP 2012-125076 A

In Patent Literature 1, the adhesive does not protrude to the top of the protruding portion and does not adhere to the magnetic centering chuck. However, there is a problem that the adhesive reservoir recesses must be additionally provided in all the protrusions of the rotor core, which complicates the manufacturing process.

SUMMARY OF THE INVENTION The present application has been made to solve the above problems, and an object thereof is to obtain a rotor manufacturing apparatus capable of simplifying the manufacturing process.

The rotor manufacturing apparatus disclosed in the present application presses a permanent magnet whose side surface is higher than the depth of the magnet attachment groove into the magnet attachment groove of the rotor core in which protrusions and magnet attachment grooves are alternately provided. A rotor-manufacturing apparatus to be attached via an adhesive, comprising: a magnet-attaching head made of a magnetic material capable of holding a permanent magnet in a columnar holding portion, which is an end surface, by magnetic force; and a coil forming a magnetic field in the holding portion. , a control power source connected to the coil to control the direction and magnitude of the magnetic field, and a magnetic material that holds the side surface of the permanent magnet at the inner portion protruding from the holding portion on each of the opposed side surfaces of the magnet pasting head portion A notch is provided from the end surface of the magnet centering chuck to the inner part thereof .

According to the rotor manufacturing apparatus disclosed in the present application, the manufacturing process can be simplified.

FIG. 4 is a schematic diagram showing an overview of when the rotor manufacturing apparatus according to Embodiment 1 adheres permanent magnets; 4 is a flow chart showing a process of attaching permanent magnets using the rotor manufacturing apparatus according to Embodiment 1; FIG. 4 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 1 attracts a permanent magnet; 4 is a schematic diagram showing a state after the permanent magnets are held in the rotor manufacturing apparatus according to the first embodiment; FIG. FIG. 4 is a schematic diagram showing a state in which the rotor manufacturing apparatus according to Embodiment 1 moves the permanent magnets closer to the magnet sticking grooves; FIG. 4 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 1 presses the permanent magnets; 4 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 1 is separated from the permanent magnets; FIG. FIG. 4 is a schematic diagram showing an outline of another rotor manufacturing apparatus according to Embodiment 1; FIG. 5 is a schematic view of part of another rotor manufacturing apparatus according to Embodiment 1; FIG. 8 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 2 attracts a permanent magnet; FIG. 8 is a schematic diagram showing a state in which the rotor manufacturing apparatus according to Embodiment 2 moves the permanent magnets closer to the magnet sticking grooves; FIG. 8 is a schematic diagram showing a state in which the rotor manufacturing apparatus according to Embodiment 2 presses the permanent magnets; FIG. 8 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 2 is separated from the permanent magnets; FIG. 11 is a schematic diagram showing a state in which another rotor manufacturing apparatus according to Embodiment 2 moves permanent magnets closer to magnet sticking grooves; FIG. 8 is a schematic diagram showing how the rotor manufacturing apparatus according to Embodiment 2 attracts a permanent magnet; FIG. 12 is a schematic diagram showing a state in which the rotor manufacturing apparatus according to Embodiment 3 moves the permanent magnets closer to the magnet sticking grooves;

A rotor manufacturing apparatus and a rotor manufacturing method using the rotor manufacturing apparatus according to embodiments of the present application will be described below with reference to the drawings. In each figure, the same or corresponding members and parts are denoted by the same reference numerals.

Embodiment 1.
FIG. 1 is a schematic diagram showing an overview when a rotor manufacturing apparatus 100 attaches a permanent magnet 1 to a rotor core 2. As shown in FIG. A rotor 20 of a permanent magnet motor (not shown) includes a rotor core 2 in which protrusions 5 and magnet attachment grooves 4 are alternately provided, and permanent magnets 1 attached to the magnet attachment grooves 4 . The rotor core 2 is made by laminating electromagnetic steel sheets, for example. In the rotor core 2, the magnetic pole directions of the adjacent permanent magnets 1 are opposite to each other. The rotor manufacturing apparatus 100 attaches the permanent magnets 1 whose side surfaces are higher than the depth of the magnet attaching grooves 4 by pressing them into the magnet attaching grooves 4 provided corresponding to the width of the permanent magnets 1 via an adhesive. It is a device that attaches The right side of FIG. 1 shows the permanent magnet 1 stuck in the magnet sticking groove 4 , and the left side of FIG. A configuration of the rotor manufacturing apparatus 100 and a rotor manufacturing method using the rotor manufacturing apparatus 100 will be described below.

The rotor manufacturing apparatus 100 includes a columnar magnet-attaching head section 3 made of a magnetic material capable of holding a permanent magnet 1 in a holding section 3a, which is an end face, by magnetic force, a coil 6a forming a magnetic field in the holding section 3a, 6a and a control power supply 6b for controlling the direction and magnitude of the magnetic field. The coil 6 a is wound around the side surface of the magnet sticking head portion 3 .

The magnet sticking head section 3 is made of a magnetic material, for example, by laminating iron or electromagnetic steel sheets. If it is made of an electromagnetic steel sheet, the eddy current that can be generated in the magnet sticking head portion 3 when the coil 6a is energized is suppressed. The holding portion 3a is manufactured in a shape matching the surface shape of the permanent magnet 1 to be held. As shown in FIG. 1, since the shape of the permanent magnet 1 when viewed from the front is semicylindrical, the holding portion 3a is formed with a curved surface. The shape of the permanent magnet 1 is not limited to the semicylindrical shape. For example, other shapes such as a rectangle and a tile shape may be used, and the shape of the holding portion 3a is a shape that matches the shape of the surface of the permanent magnet 1 to be attracted.

The control power supply 6b is a device that applies current to the coil 6a. By changing the direction of the current flowing through the coil 6a, the direction of the magnetic field generated in the holding portion 3a is changed, and magnetic attractive force or magnetic repulsive force is formed with respect to the magnetic poles of the permanent magnet 1. FIG. Further, by changing the magnitude of the current flowing through the coil 6a, the magnitude of the magnetic field generated in the holding portion 3a can be changed.

The adhesive 7 is applied to the bottom surface 1 a of the permanent magnet 1 before the permanent magnet 1 is brought into contact with the magnet attaching groove 4 . The adhesive 7 is, for example, an elastomer-based or epoxy-based adhesive. The place where the adhesive 7 is applied is not limited to the bottom surface 1a.

A rotor manufacturing method using the rotor manufacturing apparatus 100 will be described. FIG. 2 is a flow chart showing a process of attaching the permanent magnets 1 using the rotor manufacturing apparatus 100 according to the first embodiment. First, the rotor manufacturing apparatus 100 supplies a current to the coil 6a in one direction to form a magnetic repulsive force on the permanent magnet 1, and then weakens the current to reduce the magnetic repulsive force, thereby reducing the magnetic repulsive force. The magnet 1 is attracted and held by the holding portion 3a (first step: S101). FIG. 3 is a schematic diagram showing how the rotor manufacturing apparatus 100 attracts the permanent magnet 1, and FIG. 4 is a schematic diagram showing how the permanent magnet 1 is held. First, the control power source 6b applies current to the coil 6a so that a magnetic field opposite to the direction of the magnetic field of the permanent magnet 1 is formed in the holding portion 3a. In FIG. 3, the magnetic flux 8 generated from the N pole of the permanent magnet 1 and the magnetic flux 9 generated by the coil 6a are indicated by arrows. Since the magnetic flux 8 and the magnetic flux 9 are magnetic fields in opposite directions, a magnetic repulsive force is generated between the permanent magnet 1 and the magnet sticking head portion 3 to prevent the permanent magnet 1 from jumping to the holding portion 3a.

Next, as the holding portion 3a approaches the permanent magnet 1, the rotor manufacturing apparatus 100 gradually weakens the current forming the magnetic field in the opposite direction, thereby reducing the magnetic repulsive force between the permanent magnet 1 and the magnet pasting head portion 3. Weaken. By first forming the magnetic repulsive force and then reducing the magnitude of the magnetic repulsive force, the permanent magnet 1 does not jump to the holding part 3a, and the magnet sticking head part 3 can be brought close to the permanent magnet 1. - 特許庁Further, the holding portion 3a is brought closer to the permanent magnet 1, and the permanent magnet 1 is attracted to the holding portion 3a at an appropriate position without being displaced from the holding portion 3a. A current is passed through the coil 6a from the control power source 6b so that a magnetic field (magnetic flux 9) in the same direction as the magnetic field 1 is formed. By holding the permanent magnet 1 in the holding portion 3a in such a procedure, the permanent magnet 1 is prevented from jumping to the holding portion 3a, and the position of the permanent magnet 1 does not shift in the holding portion 3a, and the magnet sticking head portion can be fixed. Due to the mutual magnetic attraction force between 3 and permanent magnet 1, permanent magnet 1 is reliably held by holding portion 3a.

The rotor manufacturing apparatus 100 supplies a current in the opposite direction to generate a magnetic attraction force on the permanent magnet 1, and controls the magnitude of the current to reduce the magnetic attraction force of the magnet sticking head portion 3 on the permanent magnet 1. The magnetic attraction force acting between the rotor core 2 and the permanent magnet 1 is strengthened, and the permanent magnet 1 is moved to the magnet sticking groove 4 (second step: S102). FIG. 5 is a schematic diagram showing a state in which the rotor manufacturing apparatus 100 according to Embodiment 1 moves the permanent magnet 1 closer to the magnet sticking groove 4. As shown in FIG. When the permanent magnet 1 approaches the rotor core 2 , a magnetic attractive force is generated between the permanent magnet 1 and the rotor core 2 . In FIG. 5, the magnetic flux 8 generated from the north pole of the permanent magnet 1 is indicated by an arrow. The magnetic flux 8 is classified into a magnetic flux 8a passing through the inside of the magnet sticking head portion 3, a magnetic flux 8b going toward the magnet sticking head portion 3 through the external space, and a magnetic flux 8c going toward the projection portion 5 through the outside space. be done. Since the direction of the magnetic flux 9 and the magnetic flux 8a generated from the coil 6a inside the magnet sticking head portion 3 is the same, these magnetic fluxes are added inside the magnet sticking head portion 3. FIG. Permanent magnet 1 is attracted to rotor core 2 by magnetic flux 8c, and this magnetic attraction increases as permanent magnet 1 approaches rotor core 2. FIG. In order to prevent the permanent magnet 1 from jumping to the rotor core 2 due to this attraction, the rotor manufacturing apparatus 100 previously strengthens the magnetic attraction force at the holding portion 3 a to be greater than the magnetic attraction force acting between the rotor core 2 and the permanent magnet 1 . The magnetic flux 9 is controlled to the state to bring the permanent magnet 1 closer to the magnet sticking groove 4. - 特許庁When the permanent magnet 1 is attached adjacent to the permanent magnet 1 that has already been attached, the magnetic attraction or magnetic repulsion of the attached permanent magnet 1 may cause positional deviation of the permanent magnet 1 before attachment or the rotor core. Jumping to 2 may occur. In order to avoid these problems, if there is a permanent magnet 1 that has already been attached, the current flowing through the coil 6a is increased to increase the magnetic attraction force between the magnet attaching head portion 3 and the permanent magnet 1 before attachment. To enable a magnet sticking head part 3 to surely hold a permanent magnet 1 before sticking. The adhesive 7 is applied to the bottom surface 1a of the permanent magnet 1 during movement, but the permanent magnet 1 may be held after the adhesive 7 is applied.

The rotor manufacturing apparatus 100 presses the permanent magnet 1 against the magnet sticking groove 4 via the adhesive 7 (third step: S103). FIG. 6 is a schematic diagram showing how the rotor manufacturing apparatus 100 according to Embodiment 1 presses the permanent magnet 1. As shown in FIG. The permanent magnet 1 is pressed toward the bottom surface 4a in a state in which the bottom surface 1a of the permanent magnet 1 is not inclined with respect to the bottom surface 4a of the magnet attaching groove 4 and the parallelism between the bottom surfaces 1a and 4a is maintained. The pressing is continued until the height of the side surface 1b of the permanent magnet 1 protruding from the top portion 5a of the protrusion 5 reaches a predetermined height. The adhesive 7 spreads between the bottom surface 4a and the bottom surface 1a when the permanent magnet 1 is pressed. The spread adhesive 7 is pushed out between the side surface 1b and the side wall 4b of the magnet sticking groove 4 and protrudes to the top 5a to form a protruding portion 7a. If the amount of applied adhesive 7 is appropriate, the protruding portion 7a is formed. Since the portion adjacent to the side wall 4b of the magnet sticking groove 4 of the top portion 5a of the protruding portion 5 and the rotor manufacturing apparatus 100 are not in contact with each other during pressing, the rotor manufacturing apparatus 100 and the protruding portion 7a do not come into contact with each other. The adhesive 7 never adheres to the manufacturing apparatus 100 . After the pressing is completed, the current flowing through the coil 6a is stopped.

An appropriate amount of the adhesive 7 to be applied is determined in advance by verification experiments. In the verification experiment, the amount of the adhesive 7 applied to the bottom surface 1a was changed, and the permanent magnet 1 was repeatedly pressed against the magnet attachment groove 4. This is done by adjusting the If the protruding portions 7a are not formed on both sides of the permanent magnet 1 even though the pressure is applied until the height of the side surface 1b protruding from the top portion 5a reaches a predetermined height, the amount of the applied adhesive 7 is too small. It can be determined that In addition, if the overhanging portions 7a are not formed on both sides of the permanent magnet 1 at the time of manufacturing even though an appropriate amount of the adhesive 7 is applied, the pressing amount of the permanent magnet 1 does not reach the predetermined pressing amount. can be determined. In addition, if the protruding portion 7a is formed only on one side of the permanent magnet 1 at the time of manufacture despite the application of an appropriate amount of adhesive 7, the bottom surface 1a is pressed so as to be parallel to the bottom surface 4a. Therefore, it can be determined that the permanent magnet 1 is tilted. However, when positioning the permanent magnet 1 by bringing one side face 1b of the permanent magnet 1 into close contact with the side wall 4b facing the side face 1b, the protruding portion 7a is not formed on the brought into close contact with the side wall 4b facing the side face 1b, but it is judged to be defective. do not.

The rotor manufacturing apparatus 100 causes the direction of the current to flow in the opposite direction to form a magnetic repulsive force against the permanent magnet 1, and separates the magnet sticking head section 3 from the permanent magnet 1 (fourth step: S104). FIG. 7 is a schematic diagram showing how the rotor manufacturing apparatus 100 according to Embodiment 1 is separated from the permanent magnet 1. As shown in FIG. When moving the rotor manufacturing apparatus 100 away from the permanent magnet 1, in the same control of the magnetic flux 9 as in the second step, the magnetic attraction force acting on the permanent magnet 1 from the magnet attaching head section 3 causes the permanent magnet 1 to move away from the attached position. There is a risk of misalignment. In order to avoid this displacement of the permanent magnet 1, the rotor manufacturing apparatus 100 causes the control power source 6b to apply current to the coil 6a so that a magnetic repulsive force is formed between the permanent magnet 1 and the holding portion 3a. A magnetic flux 9 is formed. The magnetic repulsive force allows the rotor manufacturing apparatus 100 to be easily separated from the permanent magnet 1 . After separating the rotor manufacturing apparatus 100 , if the permanent magnets 1 have been attached to all the magnet attaching grooves 4 , the step of attaching the permanent magnets 1 using the rotor manufacturing apparatus 100 is completed, and all the magnet attaching grooves 4 are attached to the permanent magnets 1 . If the magnet 1 is not affixed, the process returns to the first step to continue the affixing process (fifth step: S105). When continuing the sticking process, the rotor manufacturing apparatus 100 holds a permanent magnet 1 having a polarity different from that of the stuck permanent magnet 1, and holds it in the magnet sticking groove 4 next to the stuck permanent magnet 1. Attach the permanent magnet 1. Since the polarities of the permanent magnets 1 are different when holding, the current flowing from the control power source 6b to the coil 6a is in the opposite direction.

Although the coil 6a is wound around the magnet sticking head portion 3, the coil 6a is not limited to this. As shown in FIG. The rotor manufacturing apparatus 100 is detachably provided with a winding portion 3b around which the coil 6a is wound on a bottom portion 3c, which is an end surface opposite to the holding portion 3a. The winding portion 3b is made of the same material as the magnet sticking head portion 3 or a resin material. The winding portion 3b is fixed to the bottom portion 3c by, for example, fitting or screws. By making the coil 6a replaceable, it is possible to easily change the specifications of the coil 6a, such as the number of turns of the coil 6a, the wire diameter of the wire of the coil 6a, and the outer diameter of the coil 6a. By changing the specifications of the coil 6a, a desired magnetic field can be easily formed according to the magnetic force of the permanent magnet 1 used. Further, when a problem occurs in the coil 6a, the coil 6a can be easily replaced.

In FIG. 1 or FIG. 8, the coil 6a is wound around the magnet pasting head portion 3 or the winding portion 3b. is not limited to the structure of The coil may be provided in non-contact with the magnet sticking head portion 3 or the winding portion 3b. FIG. 9 is a schematic diagram of part of another rotor manufacturing apparatus 100 according to the first embodiment. FIG. 9(a) is a cross-sectional view of the magnet sticking head portion 3 and the coil component 11 (the mounting portion is not shown). It is provided in a non-contact manner surrounding the side surface 3d. A plan view of the coil component 11 shown in FIG. 9(a) is shown in FIG. 9(b). The coil component 11 is formed by molding a coil 11a with a resin 11b. The hollow portion 11c is formed to have a size in which the magnet sticking head portion 3 can be accommodated. Attachment of the coil component 11 will be described. The coil component 11 has, for example, a handle 11d indicated by a two-dot chain line in FIG. 9B or a mounting hole 11e indicated by a one-dot chain line as a mounting portion. It is attached to a jig or the like (not shown). The mounting portion is also made of resin 11b. Even if the coil 11a is not directly wound around the magnet sticking head portion 3, the shape of the coil 11a is maintained, and the coil 11a can be installed at an arbitrary position of the magnet sticking head portion 3. The coil component 11 is installed above the magnet sticking head portion 3 with a space therebetween, as shown in FIG. I don't mind. By using the separate coil parts 11, a plurality of coil parts 11 with different numbers of turns of the coil 11a can be prepared in advance, and the desired magnetic field can be obtained in the holding part 3a simply by exchanging the coil parts 11. can be generated at

As described above, in this rotor manufacturing apparatus 100, since the portion of the top portion 5a of the protrusion 5 adjacent to the side wall 4b of the magnet attachment groove 4 is not in contact with the rotor manufacturing apparatus 100 during pressing, the rotor manufacturing apparatus 100 and the rotor manufacturing apparatus 100 are not in contact with each other. Since the protruding portion 7a does not come into contact and the adhesive 7 does not adhere to the rotor manufacturing apparatus 100, the rotor can be manufactured by simplifying the manufacturing process. Further, since the coil 6a and the control power supply 6b connected to the coil 6a are provided, a desired magnetic field can be easily applied to the permanent magnet 1 by controlling the direction and magnitude of the current flowing through the coil 6a with the control power supply 6b. can be formed. Further, when the coil 6a is wound around the side surface of the magnet sticking head portion 3, the rotor manufacturing apparatus 100 can be made compact. Further, when the coil 6a is wound around the side surface of the magnet sticking head portion 3, a magnetic field can be efficiently formed in the holding portion 3a, which is the end face of the magnet sticking head portion 3. FIG. In addition, since the coil 6a and the control power supply 6b can form a magnetic repulsive force with respect to the permanent magnet 1, it is possible to suppress the permanent magnet 1 from jumping to the holding portion 3a. can be easily separated from the permanent magnet 1 without shifting the .

Embodiment 2.
A rotor manufacturing apparatus 100 according to Embodiment 2 will be described. 10 is a schematic diagram showing how the rotor manufacturing apparatus 100 attracts the permanent magnet 1, FIG. 11 is a schematic diagram showing how the rotor manufacturing apparatus 100 approaches the permanent magnet 1 to the magnet sticking groove 4, and FIG. 13 is a schematic diagram showing how the rotor manufacturing apparatus 100 presses the permanent magnet 1, and FIG. 13 is a schematic diagram illustrating how the rotor manufacturing apparatus 100 separates from the permanent magnet 1. FIG. A rotor manufacturing apparatus 100 according to Embodiment 2 is configured to include a magnet delivery bar 6c and a magnet centering chuck 10 instead of the coil 6a and the control power source 6b.

The magnet delivery bar 6c is rod-shaped, is housed inside the magnet sticking head section 3 perpendicularly to the holding section 3a, and is protruding from the holding section 3a and movable. The magnet transfer bar 6c is made of a magnetic material, such as iron. An end portion of the magnet delivery bar 6c is a holding portion 6d that is in contact with the permanent magnet 1 and attracts the permanent magnet 1. As shown in FIG.

As shown in FIG. 11, magnet sticking head section 3 has magnet centering chucks 10 on opposite side surfaces thereof, in which side surfaces 1b of permanent magnet 1 are gripped by inner sections 10b protruding from holding section 3a. A notch portion 10a is provided from the end surface 10c of the magnet centering chuck 10 to the inner portion 10b. The magnetic centering chuck 10 is made of a magnetic material, and is produced by laminating iron or electromagnetic steel sheets, for example. Since the notch portion 10a is provided, the portion of the top portion 5a of the projection portion 5 adjacent to the side wall 4b of the magnet sticking groove 4 is not in contact with the rotor manufacturing apparatus 100 at the time of pressing. 5 passes through the magnet centering chuck 10, the magnetic attraction force with respect to the permanent magnet 1 is generated through the magnet centering chuck 10. It is strengthened by setting it.

A rotor manufacturing method using the rotor manufacturing apparatus 100 will be described. A flow chart showing the process of attaching the permanent magnets 1 using the rotor manufacturing apparatus 100 is the same as that shown in FIG. 2, and is therefore omitted. As shown in FIG. 10, the permanent magnet 1 is attracted by the holding portion 6d, which is the end portion of the magnet delivery bar 6c projected from the holding portion 3a, and then the magnet delivery bar 6c is contracted toward the magnet adhering head portion 3. The permanent magnet 1 is attracted and held by the holding portion 3a (first step: S101). Since the permanent magnet 1 is first attracted by the holding portion 6d having a weak magnetic attraction force between the permanent magnet 1 and the permanent magnet 1, the permanent magnet 1 is prevented from jumping to the holding portion 3a. Note that the holding portion 6d and the permanent magnet 1 may be separated from each other after the permanent magnet 1 is held by the holding portion 3a.

The rotor manufacturing apparatus 100 moves the permanent magnet 1 to the magnet sticking groove 4 (second step: S102). The permanent magnet 1 is held by the magnet sticking head portion 3 by magnetic attraction acting between the holding portion 6d and the holding portion 3a, and is further attracted by the magnetic force via the magnet centering chuck 10. FIG. Therefore, the magnet sticking head part 3 strengthens the magnetic attraction force for the permanent magnets 1 more than the magnetic attraction force acting between the rotor core 2 and the permanent magnets 1, and securely holds the permanent magnets 1 before sticking. As shown in FIG. 11, the permanent magnet 1 is centered by a magnet centering chuck 10 and pushed into the magnet attachment groove 4 after the attachment position is determined.

The rotor manufacturing apparatus 100 presses the permanent magnet 1 against the magnet sticking groove 4 via the adhesive 7 (third step: S103). The pressing is continued until the height of the side surface 1b of the permanent magnet 1 protruding from the top portion 5a of the protrusion 5 reaches a predetermined height. The adhesive 7 is extruded between the side surface 1b and the side wall 4b of the magnet attaching groove 4, and protrudes from the top portion 5a of the projection 5 adjacent to the side wall 4b of the magnet attaching groove 4 to form a protrusion portion 7a. As shown in FIG. 12, the portion adjacent to the side wall 4b of the magnet attaching groove 4 of the top portion 5a of the projection portion 5 and the rotor manufacturing apparatus 100 at the time of pressing are not in contact with each other through the notch portion 10a. The protruding portion 7 a does not come into contact with the rotor manufacturing apparatus 100 , and the adhesive 7 does not adhere to the rotor manufacturing apparatus 100 .

The rotor manufacturing apparatus 100 separates the magnet sticking head portion 3 from the permanent magnet 1 in a state where the permanent magnet 1 is attracted to the holding portion 6d, which is the end portion of the magnet delivery bar 6c, and then moves the magnet delivery bar 6c to the magnet sticking head. The magnet delivery bar 6c is separated from the permanent magnet 1 by contracting in the direction of the portion 3 (fourth step: S104). In order to avoid positional deviation of the permanent magnets 1 from the magnet attachment grooves 4, the rotor manufacturing apparatus 100 attaches the magnets while maintaining the state in which the permanent magnets 1 are attracted to the holding portions 6d, as shown in FIG. The head part 3 is separated from the permanent magnet 1. - 特許庁The separation weakens the magnetic attraction force between the permanent magnet 1 and the holding portion 3a. After that, the magnet delivery bar 6c is separated from the permanent magnet 1. As shown in FIG. Since the magnetic attraction force between the magnet transfer bar 6c and the permanent magnet 1 is weaker than the magnetic attraction force acting between the rotor core 2 and the permanent magnet 1, the permanent magnet 1 does not follow the magnet transfer bar 6c. The permanent magnet 1 stays in the magnet sticking groove 4 . After separating the rotor manufacturing apparatus 100 , if the permanent magnets 1 have been attached to all the magnet attaching grooves 4 , the step of attaching the permanent magnets 1 using the rotor manufacturing apparatus 100 is completed, and all the magnet attaching grooves 4 are attached to the permanent magnets 1 . If the magnet 1 is not affixed, the process returns to the first step to continue the affixing process (fifth step: S105). When continuing the sticking process, the rotor manufacturing apparatus 100 holds a permanent magnet 1 having a polarity different from that of the stuck permanent magnet 1 and sticks it to the adjacent magnet sticking groove 4 .

Although the curved notch 10a is provided in the magnet centering chuck 10, the shape of the notch 10a is not limited to this. As shown in FIG. I don't mind. The cutout portion 10a may have any other shape as long as it does not come into contact with the protruding portion 7a and the protruding portion 7a can be accommodated therein. Further, as shown in FIG. 15, for example, a hemispherical notch portion 6e may be provided in the holding portion 6d. By providing the notch portion 6e, the magnetic attraction force between the permanent magnet 1 and the holding portion 6d is weakened, so that the permanent magnet 1 is prevented from jumping to the holding portion 6d.

As described above, since the rotor manufacturing apparatus 100 is provided with the notch 10a extending from the end face 10c of the magnet centering chuck 10 to the inner portion 10b, the adhesive 7 does not adhere to the rotor manufacturing apparatus 100. Simplifications can be made to manufacture the rotor. In addition, since the magnet transfer rod 6c made of a magnetic material is provided vertically to the holding portion 3a and is housed inside the magnet pasting head portion 3 and protrudes from the holding portion 3a and is movable, by moving the magnet transfer rod 6c, The permanent magnet 1 can be easily attracted and separated by weakening the magnetic attraction force. In addition, since the magnet sticking head section 3 is provided with magnet centering chucks 10 on each of the opposing side surfaces thereof, the side surfaces 1b of the permanent magnets 1 are gripped by the inner portions 10b protruding from the holding section 3a. The permanent magnet 1 can be held by the holding portion 3 a and easily positioned in the magnet sticking groove 4 .

Embodiment 3.
A rotor manufacturing apparatus 100 according to Embodiment 3 will be described. FIG. 16 is a schematic diagram showing a state in which the rotor manufacturing apparatus 100 moves the permanent magnet 1 closer to the magnet sticking groove 4. As shown in FIG. A rotor manufacturing apparatus 100 according to the third embodiment has a configuration in which a magnetic centering chuck 10 is added to the rotor manufacturing apparatus 100 shown in the first embodiment.

As shown in FIG. 16, magnet sticking head section 3 has magnet centering chucks 10 on opposite side surfaces thereof, in which side surfaces 1b of permanent magnet 1 are gripped by inner sections 10b protruding from holding section 3a. A notch portion 10a is provided from the end surface 10c of the magnet centering chuck 10 to the inner portion 10b. The magnet sticking head section 3 includes a coil 6a and a control power source 6b connected to the coil 6a. Note that the process of attaching the permanent magnets 1 using the rotor manufacturing apparatus 100 is the same as that of the first embodiment, so the description is omitted.

As described above, since the magnet centering chucks 10 that grip the side surfaces 1b of the permanent magnet 1 with the inner portions 10b projecting from the holding portions 3a are provided on the opposed side surfaces of the magnet sticking head portion 3, the inner portions 10b As a guide, the permanent magnet 1 can be easily positioned when the permanent magnet 1 is held in the holding portion 3a. Further, since the magnet centering chuck 10 is provided, the permanent magnet 1 can be easily positioned in the magnet sticking groove 4 .

Also, while this application has described various exemplary embodiments and examples, various features, aspects, and functions described in one or more of the embodiments may vary from particular embodiment to specific embodiment. The embodiments are applicable singly or in various combinations without being limited to the application.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, modification, addition or omission of at least one component, extraction of at least one component, and combination with components of other embodiments shall be included.

Reference Signs List 1 permanent magnet 1a bottom surface 1b side surface 2 rotor core 3 magnet attachment head portion 3a holding portion 3b winding portion 3c bottom portion 3d side surface 4 magnet attachment groove 4a bottom surface 4b side wall 5 protrusion 5a top part 6a coil 6b control power supply 6c magnet delivery bar 6d holding part 7 adhesive 7a protruding part 8 magnetic flux 9 magnetic flux 10 magnet centering chuck 10a notch part 10b inner part 10c end face; 11 coil component 11a coil 11b resin 11c hollow portion 11d handle 11e mounting hole 20 rotor 100 rotor manufacturing device

Claims (6)

A rotor in which a permanent magnet whose side surface is higher than the depth of the magnet attachment groove is pressed and attached via an adhesive to the magnet attachment groove of the rotor core in which protrusions and magnet attachment grooves are alternately provided. A manufacturing device,
a columnar magnet attachment head section made of a magnetic material capable of holding the permanent magnet in a holding section, which is an end face, by magnetic force;
a coil that forms a magnetic field in the holding part;
a control power supply connected to the coil and controlling the direction and magnitude of the magnetic field;
A magnet centering chuck made of a magnetic material and holding a side surface of the permanent magnet at an inner portion protruding from the holding unit, provided on each of the opposing side surfaces of the magnet sticking head unit ,
A rotor manufacturing apparatus , wherein a notch portion is provided from an end surface of the magnet centering chuck to the inner portion . 2. A rotor manufacturing apparatus according to claim 1, wherein said coil is wound around side surfaces of said magnet sticking head and said magnet centering chuck . A rotor in which a permanent magnet whose side surface height is greater than the depth of the magnet attachment groove is pressed and attached via an adhesive to the magnet attachment groove of the rotor core in which protrusions and magnet attachment grooves are alternately provided. A manufacturing device,
a columnar magnet attachment head section made of a magnetic material capable of holding the permanent magnet in a holding section, which is an end face, by magnetic force;
a magnet transfer bar made of a magnetic material that is housed in the magnet pasting head perpendicularly to the holding portion and protrudes from the holding portion and is movable;
A magnet centering chuck made of a magnetic material and holding a side surface of the permanent magnet at an inner portion protruding from the holding unit, provided on each of the opposing side surfaces of the magnet sticking head unit,
A rotor manufacturing apparatus, wherein a notch portion is provided from an end surface of the magnet centering chuck to the inner portion. A rotor manufacturing method using the rotor manufacturing apparatus according to claim 1 or claim 2 ,
A current is passed through the coil in one direction to form a magnetic repulsive force on the permanent magnet, and then the magnitude of the current is weakened to reduce the magnitude of the magnetic repulsive force, thereby moving the permanent magnet to the holding portion. a first step of sucking and holding;
The direction of the current is reversed to form a magnetic attraction force with respect to the permanent magnet, and the magnitude of the current is controlled so that the magnetic attraction force of the magnet sticking head portion with respect to the permanent magnet is generated between the rotor core and the rotor core. a second step of moving the permanent magnet to the magnet sticking groove by increasing the magnetic attraction force acting between the permanent magnet and the permanent magnet;
a third step of pressing the permanent magnet against the magnet attaching groove via an adhesive;
and a fourth step of forming a magnetic repulsive force against the permanent magnet by further flowing the direction of the current in the opposite direction to separate the magnet sticking head section from the permanent magnet. Rotor manufacturing method. A rotor manufacturing method using the rotor manufacturing apparatus according to claim 3,
After attracting the permanent magnet to the end portion of the magnet delivery bar projecting from the holding portion, the magnet delivery bar is contracted toward the magnet sticking head portion to hold the permanent magnet by being attracted to the holding portion. a first step of
a second step of moving the permanent magnet to the magnet attaching groove;
a third step of pressing the permanent magnet against the magnet attachment groove with an adhesive after the permanent magnet is centered by the magnet centering chuck;
After separating the magnet pasting head from the permanent magnet in a state where the permanent magnet is attracted by the end of the magnet delivery bar, the magnet passing bar is contracted toward the magnet pasting head to move the permanent magnet. and a fourth step of separating the magnet delivery bar from the rotor. 6. A permanent magnet motor manufacturing method comprising manufacturing a permanent magnet motor having a rotor manufactured by using the rotor manufacturing method according to claim 4 or claim 5.

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